ML20064L797
| ML20064L797 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 02/08/1983 |
| From: | Mills L TENNESSEE VALLEY AUTHORITY |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| REF-PT21-83 10CFR-050.55E, 10CFR-50.55E, NUDOCS 8302150376 | |
| Download: ML20064L797 (2) | |
Text
i TENNESSEE VALLEY AUTHORITY CH ATTANOOGA. TENNESSEE 37401 400 Chestnut Street Tower II February 8, 1983 m
BLRD-50-438/83-12 3
o U.S. Nuclear Regulatory Commission g
Region II Attn: Mr. James P. O'Reilly, Regional Administrator 101 Marietta Street, Suite 3100 c.
Atlanta, Georgia 30303
Dear Mr. O'Reilly:
BELLEFONTE NUCLEAR PLANT UNIT 1 - DEFECTIVE SEQUENCER CONTROL CARDS FROM CONSOLIDATED CONTROL CORPORATION - BLRD-50-438/83 FIRST INTERIM REPORT The subject deficiency was initially reported to NRC-0IE Inspector P. E. Fredrickson on January 12, 1983 in accordance with 10 CFR 50.55(e) as NCR 2162. Enclosed is our first interim report. We expect to submit our next report by February 6, 1984. We consider 10 CFR Part 21 applicable to this deficiency.
If you have any questions, please get in touch with R. H. Shell at FTS 858-2688.
Very truly yours, TENNESSEE VALLEY AUTHORITY L. M. Mills, Manager Nuclear Licensing Enclosure oc:
Mr. Richard C. DeYoung, Director (Enclosure)
Office of Inspection and Enforcement U.S. Nuclear Regulatory Conunissior.
Washington, D.C.
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FIRST INTERIM REPORT Description of Deficiency Sequencer Control Card 6N194-1, SN009, in the Solid State Control System Logic Cabinet IIX-IR-006-A, slot 38, failed during an undervoltage test. Replacement card SN012 was installed and experienced a similar failure. Replacement card SNO33 was then installed and a slightly different failure was notsd. Finally, another replacement card was installed and system operation returned to normal. The Solid State Control System has been supplied to TVA by Consolidated Controls Corporation of Bethel, Connecticut.
Interim Progress All failed cards are being returned to the vendor for inspection and-determination of the cause of the failures. All cards of this type will be inspected, retested, and replaced as needed by site personnel.
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